Dear MarMamers, We would like to share our newly published open-access article comparing humpback whale group size and composition estimated from boat-based observations and drone video analysis during the 2022–2023 breeding seasons in Ilhéus, Brazil. Using data from 43 groups, we show that drones consistently recorded larger group sizes and revealed more complex group compositions than boat-based surveys, while maintaining a strong positive correlation between methods. Our results highlight the value of drone-based surveys for improving assessments of group structure during the breeding season. *Title:* From a boat and from the air: size and composition of humpback whale groups estimated by onboard observers and drone videos *Authors:* Anabela Miranda, Thomas Foucart, Alice Lima, Kalyane Ramos, Yvonnick Le Pendu *Journal:* *Ocean and Coastal Research* *Link (open access):* https://www.scielo.br/j/ocr/a/pqBX8yDkKDprXSG755TkWgB/?format=html&lang=en Best regards, Alice -- Dr. Alice Lima Post-doc researcher from GPMAI Co-founder Ecosul Turismo Grupo de Pesquisa em Mamíferos Aquáticos de Ilhéus Programa de Pós-graduação em Zoologia - PPGZOO Ilhéus - Brazil <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> Sans virus.www.avg.com <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>